:root{
    --green:green;
};

.demo{
    width: 200px;
    height: 200px;
    background: #FF0000 url("../images/mm.jpg") scroll no-repeat 0 0;
}


.test{
    display:flex;
    transform:rotateY(130deg);
    color:var(--green);
}
p{
    color: red;

}